如果在每个签名中，则立即发送 [英] Immediate If in For Each signature

问题描述

我的表格有2个网格.选项卡控件的每个选项卡页上的一个.

My form has 2 grids. One on each tab page of a tab control.

在选择哪个选项卡页之前，我想遍历网格1中的所有行或仅迭代网格2中的选定行.但是我想对两个网格使用相同的代码.

Pending on which tab page is selected, I want to iterate over all of the rows in grid 1 or only selected rows in grid 2. But I want to use the same code for both grids.

这是我的代码:

DataGridView d;
if (tabEmails.SelectedIndex == 0)
{
   d = grid1;
}
else
{
   d = grid2;
}

foreach (DataGridViewRow r in tabEmails.SelectedIndex == 0 ?  d.Rows : d.SelectedRows)
{
   // do stuff
}

除了，它不会编译.

关于如何解决这个问题的任何想法?

Any ideas on how to get round this ?

J

jppnn

推荐答案

如果让我们知道编译错误是什么以及它在哪里发生，那就太好了.

It is really nice if you let us know what the compile error is and where it occurs.

如果我不得不猜测，问题是d.Rows是DataGridViewRowCollection，而d.SelectedRows是DataGridViewSelectedRowCollection，因此?:运算符无法确定表达式的结果类型.  不知道为什么他们需要两个不同的东西 属性的类型.

If I had to take a guess, the issue is that d.Rows is a DataGridViewRowCollection and d.SelectedRows is a DataGridViewSelectedRowCollection and so the ?: operator cannot determine the result type of the expression.  No idea why they needed two different types for the properties.

它看起来真的很老，并且没有实现IEnumeable< T> ;，而只是实现了IEnumerable.

It also looks like it is really old school and doesn't implement IEnumeable<T>, just IEnumerable.

您可以执行以下操作来解决该问题:

You might be able to work around it by doing something like:

IEnumerable items;
if (tabEmails.SelectedIndex == 0)
{
   items = grid1.Rows;
}
else
{
   items = grid2.SelectedRows;
}

foreach (DataGridViewRow r in items)
{
   // do stuff
}

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